AIP Publishing
Journal of Applied Physics
,  volume 116 ,  issue 4 ,  pages 43904

Scanning tunneling microscopy study of morphology and electronic properties in (K0.7Na0.3)Fe2-ySe2 single crystal

A.S. Trifonov 1, 2
, 
Y.A. Ovchenkov 2
, 
D E Presnov 1, 2
, 
R Belosludov 3
, 
A. I. Boltalin 4
, 
M. Liu 4
, 
I. V. MOROZOV 4
, 
H Nejo 5
, 
A. N. Vasiliev 2, 6, 7
1
 
2
 
3
 
4
 
5
 
6
 
7
 
Publication type: Journal Article
Publication date: 2014-07-23
AIP Publishing
scimago Q2
wos Q3
SJR: 0.580
CiteScore: 5.1
Impact factor: 2.5
ISSN: 00218979, 10897550
General Physics and Astronomy
Abstract

We investigated the microstructure of the iron selenide superconductor (K0.7Na0.3)Fe2−ySe2 with a Tc = 32 K and a near 100% Meissner screening volume fraction. Topography and electron transport properties were studied using electron microscopy and ultra-high vacuum scanning tunneling microscopy (STM) techniques. Room temperature STM measurements reliably identify spatial variations of the local electronic properties of this material. The studied crystals consist of continuous regions with significantly different shapes of current-voltage curves reflecting different electronic transport properties of these regions. Fitting of the local current-voltage curves with the Simmons model for metal-dielectric-metal structure confirmed a phase separation in the sample to a metal and semiconducting phases. The observed regions have dimensions in the range of several tenths of a micrometer and indicate a phase separation in the sample.

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Trifonov A. et al. Scanning tunneling microscopy study of morphology and electronic properties in (K0.7Na0.3)Fe2-ySe2 single crystal // Journal of Applied Physics. 2014. Vol. 116. No. 4. p. 43904.
GOST all authors (up to 50) Copy
Trifonov A., Ovchenkov Y., Presnov D. E., Belosludov R., Boltalin A. I., Liu M., MOROZOV I. V., Nejo H., Vasiliev A. N. Scanning tunneling microscopy study of morphology and electronic properties in (K0.7Na0.3)Fe2-ySe2 single crystal // Journal of Applied Physics. 2014. Vol. 116. No. 4. p. 43904.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1063/1.4891227
UR - https://doi.org/10.1063/1.4891227
TI - Scanning tunneling microscopy study of morphology and electronic properties in (K0.7Na0.3)Fe2-ySe2 single crystal
T2 - Journal of Applied Physics
AU - Trifonov, A.S.
AU - Ovchenkov, Y.A.
AU - Presnov, D E
AU - Belosludov, R
AU - Boltalin, A. I.
AU - Liu, M.
AU - MOROZOV, I. V.
AU - Nejo, H
AU - Vasiliev, A. N.
PY - 2014
DA - 2014/07/23
PB - AIP Publishing
SP - 43904
IS - 4
VL - 116
SN - 0021-8979
SN - 1089-7550
ER -
BibTex |
Cite this
BibTex (up to 50 authors) Copy
@article{2014_Trifonov,
author = {A.S. Trifonov and Y.A. Ovchenkov and D E Presnov and R Belosludov and A. I. Boltalin and M. Liu and I. V. MOROZOV and H Nejo and A. N. Vasiliev},
title = {Scanning tunneling microscopy study of morphology and electronic properties in (K0.7Na0.3)Fe2-ySe2 single crystal},
journal = {Journal of Applied Physics},
year = {2014},
volume = {116},
publisher = {AIP Publishing},
month = {jul},
url = {https://doi.org/10.1063/1.4891227},
number = {4},
pages = {43904},
doi = {10.1063/1.4891227}
}
MLA
Cite this
MLA Copy
Trifonov, A.S., et al. “Scanning tunneling microscopy study of morphology and electronic properties in (K0.7Na0.3)Fe2-ySe2 single crystal.” Journal of Applied Physics, vol. 116, no. 4, Jul. 2014, p. 43904. https://doi.org/10.1063/1.4891227.